Mycoplasma genitalium is a small parasitic bacterium that lives on the ciliated epithelial cells of the primate genital and respiratory tracts. It is the smallest known free-living bacterium. Up until 2002 it was also considered to be the organism with the smallest genome.
M. genitalium was isolated in 1980 from urethral specimens of two male patients with non-gonococcal urethritis. Infection is fairly common and can be transmitted between partners during unprotected sex. It can be treated...

The Molluscum contagiosum virus, MCV, is a virus, in the poxvirus family, that causes the disease Molluscum contagiosum in humans. The virions have a complex structure that is consistent with the structure of the poxvirus family.
Since the virus cannot routinely be cultured diagnosis is made on the clinical appearance. It can be confirmed by excisional biopsy. There are four types of MCV and MCV-2 is usually seen in adults and is often sexually transmitted.
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A human papillomavirus (HPV), a member of the papillomavirus family, is capable of infecting humans. HPVs establish productive infections in the skin or mucous membranes. Most of the 200 known types cause no symptoms in most people. Some types can cause warts, while others can lead to cancer.
There are more than 30 to 40 types of HPV that are typically transmitted through sexual contact and infect the anogenital region. High risk HPV, can lead to cancer, in fact HPV infection is a cause of...